11t^2-9t=11

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Solution for 11t^2-9t=11 equation:


Simplifying
11t2 + -9t = 11

Reorder the terms:
-9t + 11t2 = 11

Solving
-9t + 11t2 = 11

Solving for variable 't'.

Reorder the terms:
-11 + -9t + 11t2 = 11 + -11

Combine like terms: 11 + -11 = 0
-11 + -9t + 11t2 = 0

Begin completing the square.  Divide all terms by
11 the coefficient of the squared term: 

Divide each side by '11'.
-1 + -0.8181818182t + t2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -0.8181818182t + 1 + t2 = 0 + 1

Reorder the terms:
-1 + 1 + -0.8181818182t + t2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -0.8181818182t + t2 = 0 + 1
-0.8181818182t + t2 = 0 + 1

Combine like terms: 0 + 1 = 1
-0.8181818182t + t2 = 1

The t term is -0.8181818182t.  Take half its coefficient (-0.4090909091).
Square it (0.1673553719) and add it to both sides.

Add '0.1673553719' to each side of the equation.
-0.8181818182t + 0.1673553719 + t2 = 1 + 0.1673553719

Reorder the terms:
0.1673553719 + -0.8181818182t + t2 = 1 + 0.1673553719

Combine like terms: 1 + 0.1673553719 = 1.1673553719
0.1673553719 + -0.8181818182t + t2 = 1.1673553719

Factor a perfect square on the left side:
(t + -0.4090909091)(t + -0.4090909091) = 1.1673553719

Calculate the square root of the right side: 1.080442211

Break this problem into two subproblems by setting 
(t + -0.4090909091) equal to 1.080442211 and -1.080442211.

Subproblem 1

t + -0.4090909091 = 1.080442211 Simplifying t + -0.4090909091 = 1.080442211 Reorder the terms: -0.4090909091 + t = 1.080442211 Solving -0.4090909091 + t = 1.080442211 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4090909091' to each side of the equation. -0.4090909091 + 0.4090909091 + t = 1.080442211 + 0.4090909091 Combine like terms: -0.4090909091 + 0.4090909091 = 0.0000000000 0.0000000000 + t = 1.080442211 + 0.4090909091 t = 1.080442211 + 0.4090909091 Combine like terms: 1.080442211 + 0.4090909091 = 1.4895331201 t = 1.4895331201 Simplifying t = 1.4895331201

Subproblem 2

t + -0.4090909091 = -1.080442211 Simplifying t + -0.4090909091 = -1.080442211 Reorder the terms: -0.4090909091 + t = -1.080442211 Solving -0.4090909091 + t = -1.080442211 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4090909091' to each side of the equation. -0.4090909091 + 0.4090909091 + t = -1.080442211 + 0.4090909091 Combine like terms: -0.4090909091 + 0.4090909091 = 0.0000000000 0.0000000000 + t = -1.080442211 + 0.4090909091 t = -1.080442211 + 0.4090909091 Combine like terms: -1.080442211 + 0.4090909091 = -0.6713513019 t = -0.6713513019 Simplifying t = -0.6713513019

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.4895331201, -0.6713513019}

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